Siemens LMV51 Series Operator's manual

Valid for the following software versions:
LMV51... : V01.90
Int. LC: V01.40
AZL51... : V01.70
CC1P7550en
29. 05. 2002
Siemens Building Technologies
HVAC Products
LMV51...
Burner Control with integrated Fuel / Air Ratio
Control and Load Control for Forced-draft Burners
Basic Documentation

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Safety notes
Please note: The present basic Documentation describes the large number of applications and
functions and shall serve as a guideline. The correct functioning of the system is to be
checked and proven on a test rig or on the actual application in the plant!
·Degree of protection IP40 to EN 60 529 for burner controls must be ensured by the burner or boiler
manufacturer by adequately mounting the LMV51...
·In the geographical areas where DIN norms apply, mounting and installation must be in compliance
with the relevant VDE requirements, specifically DIN / VDE 0100, 0550 and DIN / VDE 0722!
·The electric wiring inside the boiler must conform to country-specific and local regulations!
·Ensure that spliced wires cannot get into contact with neighboring terminals. Use adequate ferrules!
·Prior to commissioning, check wiring and the parameter settinfs carefully!
·When commissioning the plant, check all safety functions!
·Before performing any wiring changes or other work in the connection area of the LMV51...,
completely isolate the unit from the mains supply!
·Lay high-voltage ignition cable completely separate from all other cables!
·Ensure protection against electric shock hazard on the LMV51... itself and on all electrical connections
through appropriate mounting!
·There is no absolute protection against incorrect use of the RAST5 connectors.
For this reason, prior to commissioning the plant, check correct assignment of the connectors.
·The burner manufacturer must fit dummy plugs to all AC 230 V terminals that are not used
(refer to «Product range overview» and «Suppliers for other accessories»)
·When wiring the unit, AC 230 V mains voltage and extra low-voltage must always be run strictly
separate to warrant protection against electric chock hazard!
·Protect the mains-powered ionization probe against electric shock hazard!
The LMV51... is a safety device!
·Do not open, interfere with or modify the unit!
·Siemens is not liable for any damage resulting from unauthorized interference!
·In the event of blown fuses, return the unit to Siemens!
·Check electromagnetic emissions on an application-specific basis!
To ensure the safety and reliability of the LMV51..., the following points must also be observed:
- Condensation, formation of ice and ingress of water are not permitted!
Should such conditions have occurred, make sure the unit is completely dry again before switching on!
- Static charges must be avoided as they can damage the unit’s electronic components
Recommendation: Use ESD equipment!

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Safety notes on settings and parameterization
·When adjusting the electronic fuel / air ratio control system integrated in the LMV51…, allow for
sufficient amounts of excess air since - over a period of time - flue gas setting values will be affected
by a number of influencing factors (density of air, wear and tear of actuators and regulating units, etc.).
For that reason, the flue gas values initially set must be checked at regular intervals.
·To provide protection against inadvertent or unauthorized parameter transfer from the parameter
backup memory of the AZL51... to the basic unit of the LMV51..., the OEM1) must enter an individual
burner ID for each burner.
The LMV51… system prevents the transfer of a parameter set from some other plant (with inadequate
and possibly dangerous parameter values) via the backup memory of the AZL51… to the basic unit of
the LMV51… only if the above regulation is observed (for more detailed information, refer to the
description of burner ID in section « Display and operating unit AZL51...»).
·With the LMV51…, it is to be noted that the characteristics of the unit are determined primarily by the
specific parameter settings rather than by the type of unit.
This means that, among other things, each time a plant is commissioned, the parameter settings must
be checked and the LMV51… may not be transferred from one plant to another without matching the
parameter settings to the new plant!
·In programming mode, the position check of the actuators and, if required, of the variable speed drive
(that is, checking of the electronic fuel / air ratio control system) is different from the check in
automatic mode.
Like in automatic mode, the actuators are still jointly driven to their required positions. If an actuating
device does not attain the targeted position, it will be corrected until the required position is reached.
However, for this corrective action – in contrast to automatic mode – there is no time limit. The other
actuating devices maintain their current positions until all have reached their required positions.
This is required for adjusting the fuel / air ratio control system.
This means that during the period of time the fuel / air ratio curves are programmed, the engineer
making the adjustments must continuously check and monitor the quality of the combustion process
(e.g. by means of a flue gas analyzer). If there is poor combustion or dangerous conditions, he must
take appropriate measures like manual shutdown of the system.
·In the case of dual-fuel burners and firing on oil, the short preignition (Phase 38) parameter
OnTmeOilIgnition is to be selected and a magnetic clutch to be provided, thus ensuring that there will
be no oil pressure until this phase is reached.
With proper oil burners, the magnetic clutch is not required. In that case, the long preignition time
(from Phase 22) must be parameterized.
·When using the PC software ACS450, the safety notes contained in the relevant Operating Instructions
(CC1J7550) must be observed.

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Stützpunktnummern (SP) Stützpunktdaten
Stützpunktdaten
·A password is required to protect the parameter setting level against unauthorized access.
The OEM assigns individual passwords to the parameter setting levels he can access.
The default passwords used by Siemens must be changed by the OEM.
These passwords are confidential and may only be given to persons authorized to access such
parameter setting levels!
·The responsibility for setting the parameters is with the person who - in accordance with his access
rights - has made changes to the respective setting level.
In particular, the OEM assumes responsibility for the correct parameterization in compliance with the
norms and standards covering the specific application (e.g. EN 676, EN 267, EN 1643, TRD 411, TRD
412, etc.).
1) OEM = burner or boiler manufacturer

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Contents
1 General .........................................................................................................10
1.1 Brief description.............................................................................................10
-Basic diagram ....................................................................................... 10
1.2 Product range overview................................................................................. 12
1.3 Type code LMV51... ......................................................................................15
1.4 Block diagram inputs / outputs ......................................................................16
2 Fuel train applications (examples).............................................................19
-Direct gas ignition ................................................................................. 19
-Gas pilot ignition 1 ................................................................................19
-Gas pilot ignition 2 ................................................................................19
-Direct ignition with light oil, multistage .................................................. 20
-Direct ignition with light oil, modulating.................................................21
-Fuel valve control program ................................................................... 21
-Direct ignition with heavy oil, multistage ...............................................22
-Direct ignition with heavy oil, modulating..............................................22
-Fuel valve control program ................................................................... 22
-Dual-fuel burner gas / light oil with gas pilot ignition.............................24
-Fuel valve control program ................................................................... 24
-Dual-fuel burner gas / heavy oil with gas pilot ignition..........................25
-Fuel valve control program ................................................................... 25
3 Burner control..............................................................................................26
3.1 Description of inputs and outputs ..................................................................26
-Flame signal input and flame detector X10–01 and X10–03 ................ 26
-Self-test function LMV / QRI..............................................................26
-Technical data flame supervision .........................................................26
3.1.1 Digital inputs .................................................................................................. 28
-SAFETY LOOP X3–04.......................................................................... 28
-FLANGE X3–03 ....................................................................................28
-Inputs for external controller (ON/OFF) X5–03.....................................28
-2 inputs (ON / OFF or STAGE2 / STAGE3)..........................................28
-Air pressure switch (APS) X3–02 .........................................................29
-Pressure switch-VP-gas / LT or closed position indicator (CPI) X9–03 29
-Pressure switch-min-gas, start release gas (PSmin-gas) X9–03..........29
-Pressure switch-max-gas, (PSmax-gas) X9–03 ................................... 29
-Pressure switch-min-oil (PSmin-oil) X5–01...........................................30
-Pressure switch-max-Oil (PSmax-Oil) X5–02....................................... 30
-Start release-oil (START) X6–01 ..........................................................30
-Direct heavy oil start (HO-START) X6–01 ............................................30
-Fan contactor contact (FCC) or FGR-PS X4–01................................... 30
3.1.2 Digital outputs................................................................................................31
-Alarm output, type No-SI X3–01 ...........................................................31
-Output fan, type No-SI X3–01............................................................... 31
-Output ignition, type SI (IGNITION) X4–02........................................... 31
-Outputs valves-oil , type SI (V...) X8–02, X8–03, X7-01, X7-02 ........... 31
-Outputs valves -gas, type SI (V..., SV, PV) X9–01 ............................... 31
-Output oil pump / magnetic clutch, type No-SI X6–02 .......................... 32

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-Output «Start signal» or «PS valve» (APS test valve) type No-SI
(START) X4–03.....................................................................................32
3.2 Program sequence.........................................................................................33
3.2.1 Parameters ....................................................................................................33
-Time parameters ...................................................................................33
3.2.2 Gas valve proving ..........................................................................................33
-Determination of VP leakage rate......................................................34
3.2.3 Special functions during the program sequence............................................35
-Lockout phase (Phase 00) ....................................................................35
-Safety phase (Phase 01).......................................................................35
-Reset / manual lockout..........................................................................35
-Signaling start preventions....................................................................36
-Forced intermittent operation ................................................................36
-Program stop function ...........................................................................36
-Gas shortage program ..........................................................................37
-Part load shutdown ...............................................................................37
-Normal / direct start...............................................................................37
-Continuous fan operation ......................................................................38
-Response to extraneous light in standby ..............................................38
3.2.4 Selection of fuel .............................................................................................38
-Selection of fuel with the fuel selector on the LMV51... ........................38
-Selection of fuel on the AZL51... ...........................................................38
-Selection of fuel via bus ........................................................................38
-Fuel changeover ...................................................................................38
3.2.5 Sequence diagrams .......................................................................................39
-Direct gas ignition..................................................................................39
-Gas pilot ignition 1.................................................................................40
-Gas pilot ignition 2.................................................................................41
-Light oil direct ignition............................................................................42
-Heavy oil direct ignition .........................................................................43
-Light oil with gas pilot ignition................................................................44
-Heavy oil with gas pilot ignition .............................................................45
-Legend to the sequence diagrams........................................................46
4 Fuel / air ratio control (FARC).....................................................................47
4.1 General ..........................................................................................................47
4.1.1 Program sequence.........................................................................................47
-Standby .................................................................................................47
-Preventilation ........................................................................................47
-Ignition...................................................................................................47
-Traveling to the operating position ........................................................48
-Operation ..............................................................................................48
-End of operating position ......................................................................48
-Postpurging ...........................................................................................48
-Actuator speed outside normal operation .............................................48
-Operating position .................................................................................49
-Modulating .........................................................................................49
-Multistage operation ..........................................................................49
4.1.2 Position check................................................................................................51
-Dynamic safety time ratio control ..........................................................51
-Outside the operating position ..............................................................53
-Operating position modulating ..............................................................53

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-Operating position multistage ............................................................... 53
4.1.3 Special features............................................................................................. 53
-Program stop ........................................................................................ 53
-Direction of rotation of actuators........................................................... 53
-Limitation of the load range ..................................................................54
-With / without auxiliary actuator ............................................................54
-Number of fuel actuators ......................................................................55
-Traveling times...................................................................................... 55
-Shutdown behavior ...............................................................................55
-Overload protection of actuators........................................................... 55
-Curve adjustment.................................................................................. 55
5 Temperature or pressure controller (internal load controller LC) .......... 56
5.1 General.......................................................................................................... 56
5.2 Connection diagram ...................................................................................... 56
5.3 Operating modes with the load controller...................................................... 56
-Operating mode 1 (extLC) .................................................................... 57
-Operating mode 2 (intLC) ..................................................................... 58
-Operating mode 3 (intLC via BMS).......................................................58
-Operating mode 4 (intLC BMSan).........................................................59
-Operating mode 5 (extLCanalg)............................................................59
-Operating mode 6 (extLC via BMS)......................................................60
5.4 Control (characteristics).................................................................................61
-Operating mode ....................................................................................61
5.4.1 Integrated 2-position controller (C = ON / OFF) ............................................61
-General .................................................................................................61
-Switching differentials ....................................................................... 61
5.4.2 Modulating control .........................................................................................62
-General .................................................................................................62
-Function diagrams ................................................................................ 62
-Control parameters ............................................................................... 62
-Manual setting of the control parameters..........................................62
-Self-setting of control parameters (adaption)........................................ 63
-Adaption sequence ............................................................................... 63
-Checking the control parameters.......................................................... 64
-Example ............................................................................................64
-Settling of the manipulated variable...................................................... 65
-Principle ............................................................................................ 65
5.4.3 Multistage control ..........................................................................................66
-General .................................................................................................66
-Load-dependent activation of the higher burner stages .......................66
-Function diagrams ................................................................................ 66
5.5 Actual values (X) ........................................................................................... 67
-Input 1, TEMP, Pt100 sensor (DIN) X60............................................... 67
-Input 2: TEMP. / PRESS INPUT, DC 0...10 V / DC 2...10 V / 4...20 mA
X61........................................................................................................68
-Input 4: TEMP, Pt1000 / LG-Ni 1000 X60............................................. 68
5.6 Setpoints (W)................................................................................................. 69
-Internal setpoint .................................................................................... 69
-Input 3: SET POINT INPUT X62........................................................... 69
-External predefined setpoint ............................................................. 69

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-External predefined load....................................................................69
-External predefined load, modulating ................................................70
-External predefined load, multistage .................................................70
-External setpoint changeover ............................................................70
-External setpoints or predefined load via digital e-bus interface...........70
5.7 Integrated temperature limiter function ..........................................................71
-TL within the scope of TRD...................................................................71
-TL with external predefined load ...........................................................71
-Requirements placed on sensor and protection pocket ........................71
5.8 Cold start thermal shock protection (CSTP) ..................................................72
5.8.1 CSTP - modulating operation.........................................................................72
5.8.2 CSTP - multistage operation..........................................................................73
5.9 Output ............................................................................................................73
5.9.1 Output 4...20 mA............................................................................................73
-Output, modulating................................................................................73
-Output, multistage .................................................................................73
5.10 Multiboiler plants ............................................................................................74
5.10.1 Multiboiler plants by means of an analog input..............................................74
5.10.2 Multiboiler plants by means of a digital interface ...........................................74
6 Display and operating unit AZL51..............................................................75
6.1 Assignment of AZL51… terminals .................................................................76
-Connecting cable to the e-bus adapter .................................................77
-Connecting cable to the PC ..................................................................77
6.2 Ports of the AZL51… .....................................................................................78
6.2.1 Port for the PC ...............................................................................................79
6.2.2 Connection to superposed systems such as a BMS......................................79
-General information and BMS functions ...............................................79
-Exchange of data ..................................................................................80
6.3 Display and settings.......................................................................................81
6.3.1 Menu structure ...............................................................................................81
-Displays.................................................................................................82
-Lockout and error messages.................................................................85
-Standard parameterizations (incl. entry of password)...........................88
-Entry of password (PW).....................................................................89
-Addressing the actuators (function assignment) ....................................91
-Direction of rotation ...........................................................................92
-Reset .................................................................................................92
-Operational status indication by LED on the actuator .......................92
-Special function curve settings FARC...................................................93
-Special function adaption LC ..............................................................103
-Burner identification (burner ID) ..........................................................105
-Makeup of burner ID........................................................................105
-Languages ..........................................................................................105
-Real time clock and calendar ..............................................................105
-S / W changeover ............................................................................105
-Backup.............................................................................................106
-Batterietyp .......................................................................................106
-Adjustment of contrast (display)..........................................................106
-Shutdown function...............................................................................106

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6.4 Safety check function ..................................................................................107
-Loss-of-flame test ............................................................................... 107
-SLT test .............................................................................................. 107
6.5 Menu and parameter lists ............................................................................ 107
-AZL51… menu structure with parameter definitions........................... 107
7 Commissioning instructions for the LMV51... system...........................117
7.1 Practice-oriented setting instructions for the system configuration, the
burner control, and the electronic fuel / air ratio control system .................. 117
7.1.1 Basic configuration ...................................................................................... 117
7.1.2 Settings for gas-fired operation ................................................................... 120
7.1.3 Settings for multistage firing on oil...............................................................123
7.1.4 Extra functions of the LMV51... ...................................................................127
7.1.5 Configuration of the load controller.............................................................. 129
7.1.6 Control parameters of the load controller .................................................... 130
8 Connection terminals / coding of connectors...........................................134
8.1 Connection terminals of the LMV51... ......................................................... 134
8.2 Coding of connectors................................................................................... 135
9 Mounting, electrical installation and service ..........................................136
-Installation........................................................................................... 136
-Electrical connections and wiring........................................................136
-Connection of LMV51... bus ...............................................................136
9.1 Power supply to the LMV51... system ......................................................... 137
-Determination of the maximum cable length ......................................139
-Types of cable .................................................................................... 140
9.2 Suppliers of other accessory items.............................................................. 141
10 Duties of the authorized inspector ..........................................................142
-Correct parameterization of the system..............................................142
-General ...............................................................................................143
11 Technical data............................................................................................144
11.1 LMV51... and AZL51.................................................................................... 144
-Basic unit LMV51................................................................................144
-LMV51... / AZL51… (battery).............................................................. 144
11.2 Loads on terminals, cable lengths and cross-sectional areas ..................... 145
-Loads on terminals ............................................................................. 145
-Load on terminals «outputs» ..............................................................145
-Load on individual contacts..................................................................146
-Cable lengths......................................................................................146
-Cross-sectional areas ......................................................................... 146
-Fuses used in the basic unit LMV51...................................................146
12 Dimensions ................................................................................................ 147
-LMV51.................................................................................................147
-AZL51... ..............................................................................................147
13 Addendum 1: List of error messages of LMV51... system.....................148
14 Addendum 2: Connection diagram..........................................................156

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1 General
1.1 Brief description
The LMV51... is a microprocessor-based burner management system with matching
system components for the control and supervision of forced draft burners of medium to
large capacity.
The following components are integrated in the basic unit of the LMV51...:
·Burner control with gas valve proving system
·Electronic fuel / air ratio control system for a maximum of 4 actuators
·Optional PID temperature / pressure controller (load controller)
The system components (display and operating unit AZL51..., actuators, etc.) are
interconnected via a bus system. Communication between the individual bus users
takes place via a reliable, system-based data bus.
The safety concept makes use of 2 microprocessors for 2-channel signal processing.
It offers a very high level of safety and reliability for monitoring the software and the
program and control sequences.
All safety-related digital outputs of the system are permanently monitored via a contact
feedback network.
For flame supervision in connection with the LMV51..., universal infrared flame detectors
type QRI... or ionization probes can be used for continuous operation, and photoresistive
flame detectors type QRB... for intermittent operation.
Example: Dual-fuel burner
- Gas: Modulating
- Oil: 2-stage
Basic diagram

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The burner management system is operated and programmed with the help of the
display and operating unit AZL51... or a PC tool.
The AZL51… with LCD cleartext and menu-driven operation affords straightforward
operation and targeted diagnoses.
For making diagnoses, the LCD shows the operating states, the type of fault and the
point in time the fault occurred.
The parameter setting levels for the burner / boiler manufacturer and heating engineer
are password-protected to prevent unauthorized access.
Basic settings that the plant operator can make on site do not demand a password.
Also, the AZL51... is used as an interface for superposed systems such as a building
management systems, or for a PC using the ACS450 software.
Among other things, the unit affords convenient readout of settings and operating states,
parameterization of the LMV51..., and trend recording.
When replacing the LMV51... basic unit (BU), all parameters can be saved in a backup
memory of the AZL51... to be loaded back into the basic unit.
This means that reprogramming is not required.
When designing the fuel trains, the burner / boiler manufacturer can choose from a total
of 7 valve families. The large number of individual parameterization choices (program
times, configuration of inputs / outputs, etc.) enable him to make optimum adaptions to
the specific application.
The universal SQM4... actuators are driven by stepper motors and can be positioned
with a high resolution. The characteristics and settings of the actuators are defined by
the basic unit of the LMV51... .

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1.2 Product range overview
PC tool for convenient programming and burner settings, process visualization, data
recording, selection of AZL51... language, software update AZL51...
CAN bracket for connecting the CAN bus to the basic unit.
Power transformer for CAN bus users with power characteristics matched to the
requirements of the LMV51... .
CAN bus connecting cable between basic unit and AZL51… and for short distances to
the SQM4x. Shielded 5-core cable, 500 m.
CAN bus connecting cable between basic unit and AZL51… and for short distances to
the SQM4x. Shielded 5-core cable, 100 m.
CAN bus connecting cable between basic unit and actuators or between actuators.
Shielded 5-core cable, 500 m.
CAN bus connecting cable between basic unit and actuators or between actuators.
Shielded 5-core cable, 100 m.
Display and operating unit. Detached unit for front panel mounting with text display,
4 x 16 characters, 4 silicon buttons. Real time clock and e-bus interface for BMS.
Demo case including LMV51.100A2, AZL51.00A1, 2 x SQM45.295A9, and AGG5.220.
Operating buttons for simulation. Electronic simulation of controlled system, burner
graphics and LEDs.
Microprocessor-based burner control for single- and dual-fuel burners of any capacity.
Electronic fuel / air ratio control system on CAN bus basis with up to 4 actuators.
Integrated gas valve proving system.
Same as LMV51.000A2, plus load controller. Integrated digital PID boiler temperature or
pressure controller (LC), limit sensor conforming to TRD (Technische Richtlinien Dampf
= Technical Directives for Steam). Automatic adaption of the controller characteristics
depending on operating mode (modulating or multistage).
Infrared flame detector. Universal flame detector for oil or gas flames. Suited for
intermittent or continuous operation, with integrated flame amplifier and prefabricated
connecting cable 180 cm. Front illumination.
Infrared flame detector. Universal flame detector for oil or gas flames. Suited for
intermittent or continuous operation, with integrated flame amplifier and prefabricated
connecting cable 180 cm. Lateral illumination.
Actuator. Nominal torque 3 Nm, running time 10…120 seconds. Control and feedback
via CAN bus. Stepper motor, flush panel mounting, Woodruff key.
Actuator. Nominal torque 3 Nm, running time 10…120 seconds. Control and feedback
via CAN bus. Stepper motor, flush panel mounting, D-shaft.
Actuator. Nominal torque 20 Nm, running time 30…120 seconds. Control and feedback
via CAN bus. Stepper motor, flush panel mounting, parallel key.
Actuator. Nominal torque 35 Nm, running time 60…120 seconds. Control and feedback
via CAN bus. Stepper motor, flush panel mounting, parallel key.
ACS450
AGG5.110
AGG5.220
AGG5.630
AGG5.631
AGG5.640
AGG5.641
AZL51.00A1
KF8893
LMV51.000A2
LMV51.100A2
QRI2A2...
QRI2B2...
SQM45.291A9
SQM45.295A9
SQM48.497A9
SQM48.697A9

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CAN bus connecting cable between basic unit and AZL51..., complete with connector
type 3.5 and Sub-D, 3 m.
Standard connector set LMV51... for gas / oil applications with up to 3 actuators.
LMV51... Terminal
designation
Description
Rast 5
1 X3-01 Alarm, fan
1 X3-02 Air pressure switch (APS)
1 X3-03 Burner flange
1 X3-04 Power supply safety loop
1 X4-01 Fuel selection, lockout reset
1 X4-02 Ignition
1 X4-03 Start signal / PS relieve valve
1 X5-01 Oil pressure switch min.
1 X5-02 Oil pressure switch max.
1 X5-03 Load controller external
1 X6-01 Direct heavy oil start
1 X6-02 Magnetic clutch / oil pump
1 X6-03 Safety valve SV (oil)
1 X7-01 Oil valve V2
1 X7-02 Oil valve V3
1 X7-03 Not used
1 X8-01 Operating on gas / oil
1 X8-02 Oil valve V1
1 X8-03 Oil valve V1
1 X9-01 Gas valves
1 X9-02 Protective earth, neutral conductor
1 X9-03 Gas pressure switch min., max.
1 X10-01 Power transformer (prim I, sec I)
1 X10-02 Flame detector - QRB..., QRI...
5 [ / ] Plug
1 X10-03 Ionization probe ION
Transformer
1 prim I CDO
1secIDFO
1secIIDEFL
Type 3.5
2 X50, X51 CAN bus (6-pole)
1 X52 Transformer, secondary side (4-pole, low-voltage)
1 X60 Inputs 1 and 4 - temperature sensor (5 pins), TEMP.
1 X61 Input 2 - pressure input - temperature limiter (5 pins)
TEMP./PRESS. INPUT
1 X62 Input 3, analog input (5 pins), SET POINT INPUT
1 X63 Load output (3 pins), LOAD OUTPUT
6 [ / ] Actuator (5 pins)
AGG5.635
AGG5.720

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Extension connector set LMV51... (in addition to AGG5.720, covering all connector
variants).
LMV51... Terminal
designation
Description
Type 3.5
2 [ / ] Actuator (5 pins)
Variable speed drive
2 [ / ] 4-pin connector 2 x
1 [ / ] 5-pin connector 1 x
1 [ / ] 6-pin connector 1 x
Rast 5
Transformer
1 prim I CDO
1secIIDEFL
Cable
AZL51… cable, complete
[ / ] Cable AGG5.630
[ / ] Cable AGG5.640
1 [ / ] Sub-D connector
1 [ / ] 6-pin connector type 3.5
Actuator cable
AGG5.721

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1.3 Type code LMV51...
7550s18E/0502
LV
Main group and basic design
LM Burner control, microprocessor-based
V CAN bus system, dual- and single-fuel burner for
continuous or intermittent operation, depending on
the type of flame detector
Gas valve proving
M5X. XXX A X
Voltage / frequency
1 AC 120 V / 50 - 60 Hz
2 AC 230 V / 50 - 60 Hz
XX
Series
A
Auxiliary function / other features
0 None
1Integrated digital PID boiler
temperature / pressure controller
Adaption of controller characteristics (PID)
Temperature limiter
Automatic adaption of controller characteristics
according to operating mode (modulating / multistage)
2Same as 1(PID controller) plus variable speed drive
and fuel counter connection facility
Basic function
51 Electronic fuel / air ratio control
with up to 4 actuators
52 Electronic fuel / air ratio control
with O2 trim control and up to 5 actuators

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HVAC Products 1 General 29.05.2002
1.4 Block diagram inputs / outputs
X3-04.3
X3-04.5 Power supply live conductor (L)
X3-04.4 Power supply neutral conductor (N)
Protective earth (PE)
X3-04.2 Power signal for safety loop
X3-04.1 Safety loop
X3-03.2 Power signal for end switch burner flange
X3-03.1 End switch burner flange
(part of safety loop)
X3-01.2 Alarm
X3-01.1 Fan motor contactor
IgnitionX4-02.3
Start signal or PS relief (APS test valve)X4-03.3
Oil pump / magnetic clutch
X6-02.3
Fuel valve SV (OIL)
X6-03.3
Fuel valve V2 (OIL)X7-01.3
Fuel valve V3 (OIL)X7-02.3
Fuel valve V1 (OIL)X8-02.1
Auxiliary terminal for valves connected in series
X8-02.2
Fuel valve V1 (OIL)X8-03.1
Auxiliary terminal for valves connected in seriesX8-03.2
Signal lamp oil
X8-01.2
Signal lamp gasX8-01.1
X4-02.2
X4-03.2
X6-02.2
X6-03.2
X7-01.2
X7-02.2
X8-02.3
X8-03.3
M
P
SLT AUX WATER-
SHORTAGE
L1-L3
FAN
PE
N
L1
F 6,3 AT
L1'
OIL
OIL + GAS
OIL + GAS
LMV51.x
LMV51.x
3
7550a10E/1

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HVAC Products 1 General 29.05.2002
Fuel valve SV (GAS)X9-01.1
Fuel valve V2 (GAS)X9-01.3
Fuel valve PV (GAS)
X9-01.2
Fuel valve V1 (GAS)X9-01.4
X9-02.1
Air pressure switch (APS)
X3-02.1
P
Fuel selection GAS
X4-01.4
Fuel selection OIL
X4-01.1
X4-01.3
X4-01.2
Fan contactor contact (FCC) or FGR-PS
Reset / manual lockout
OIL
GAS
X5-03.1
X5-03.2
X5-03.3
X5-03.4
Controller (ON/OFF)
Controller closes / stage 3
Controller opens / stage 2
Power signal
for controller
ON/OFF
2
3
X3-02.2
Power signal for air
pressure switch (APS)
X5-01.2X5-01.3
P
X5-02.2
X5-02.3 P
min
max
Pressure switch-min-oil
Power signal for
pressure switch-min-oil
Pressure switch-max-oil
Power signal for
pressure switch-max-oil
X6-01.1
X6-01.2
X6-01.3
X6-01.4
Start release oil
Power signal for
start release oil
Heavy oil direct start
Power signal for
heavy oil direct start
START
HO-START
X9-03.4
P
X9-03.3
min
max
Pressure switch-min-gas
Pressure switch-max-gas
X9-03.2
X9-03.1
LT
Power signal for
pressure switch
Pressure switch VP gas LT or
closed position indicator (CPI)
(CPI)
X10-01.3
X10-01.2
X10-01.1
L1'
X10-01.4 PRI
LINE
SEK I
12VAC
Neutral conductor
Power signal
transformer
AC power signal G0
AC power signal G
X10-02.6
X10-02.2
QRI (IR detector) signal voltage
Protective earth (PE)
X10-02.5
Neutral conductor (N)
X10-02.4
X10-02.3 Power supply (L)
QRI (IR detector) power supply
X10-02.1 QRB signal voltage
X10-03.1 Ionization probe (ION)
QRI
QRB
ION
OIL
GAS
GAS
INT
1
1
2
2
T1
AGG5.2xx
OIL + GAS
FLAME
LMV51.x LMV51.x
P
P
7550a10E/2
Block diagram (cont‘d)

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HVAC Products 1 General 29.05.2002
X60.5
Functional earth for
shield connection
X60.2
X60.4
Line compensation
Pt100
X60.3
X60.1
Temperature sensor
Pt/Ni 1000 (input 4)
Temperature sensor
Pt 100 (input 1) Pt 100 Pt/Ni 1000
TEMP.
X61.5
Functional earth for
shield connection
X61.3
X61.4
Current input
4-20 mA (input 2)
Reference ground
X61.1
X61.2
Power supply for temp./
pressure transmitter
Voltage input
DC 0-10 V (input 2)
TEMP./PRES. INPUT
J
4-20mA
0-10 V
U
I
X62.5
Functional earth for
shield connection
X62.3
X62.4
Current input
4-20 mA (input 3)
Reference ground
X62.1
X62.2
Power supply for
setpoint changeover
Voltage input
DC 0-10 V (input 3)
SET POINT INPUT
4-20mA
0-10 V
U
I
+
+
+
+
X63.1
X63.2
Current output
4-20 mA
Burner output
Reference ground
X63.3
Functional earth for
shield connection
LOAD OUTPUT
X50.1 Functional earth for
shield connection
X50.4
X50.5
Reference ground
(PELV) GND
X50.2
X50.3
X50.6
12VAC2
12VAC1
CANH
CANL
BUS
X52.2
X52.3
X52.4
X52.1 12VAC1
Reference ground
(PELV)
12VAC2
Functional earth
X51.1 Functional earth for
shield connection
X51.4
X51.5
Reference ground
(PELV) GND
X51.2
X51.3
X51.6
12VAC2
12VAC1
CANH
CANL
BUS
12VAC2
12VAC1
CANH
CANL
GND
SHIELD
12VAC2
12VAC1
CANH
CANL
GND
SHIELD
12VAC2
12VAC1
CANH
CANL
GND
SHIELD
12VAC2
12VAC1
CANH
CANL
GND
SHIELD
12VAC2
12VAC1
CANH
CANL
GND
SHIELD
AZL5.x
FE
FEFEFE
SQM4.xSQM4.xSQM4.xSQM4.x
brown
white
yellow
green
black
Temperature / pressure controller
Power supply
(PELV)
LMV51.x
LMV51.x
J
J/ p
J/ p
PRI LINE
SEK I 12VAC
SEK II
12VAC
SEK III
12VAC
FE
1
2
3
4
T1
AGG5.2xx
7550a10E/3
brown
white
yellow
green
black
Block diagram (cont‘d)
12V 0 0 12V
DEFL
1 2 43
21
CDO
(02-D)
DFO
(02-I)
LINE
12V/1,2A
1 2
SEK II SEK III SEK I
PRI

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HVAC Products 2 Fuel train applications (examples) 29.05.2002
2 Fuel train applications (examples)
SV V1 V2
Direct ignition
G
Program
7550s01E/0202
ACT
PS
max
PS
min
PS
VP
SV V1
ACT
V2
Program Gp1 Gas pilot
7550s02E/0202
PV
PS
min
PS
VP
PS
max
SV
PS
max ACT
V2
Program Gp2 Gas-Pilot
7550s17E/0202
PS
min
PV
V1
PS
VP
Gas (always modulating)
Direct trafo ignition
G
PV V1 V2
ts 1
ts 2
Operation
*)
Pilot ignition 1
Gp1
PV V1 V2
Pilot ignition 2
Gp2
PV V1 V2
7550f0 1aE/0800
Legend to fuel trains:
*) Not used
1) Series connection of two 115 V
valves (each requiring approx. 25 VA
control power)
2) Preheating device
V Fuel valve
VP Gas valve proving
PS Pressure switch
HE Heating element
HO Heavy oil
LO Light oil
ACT Actuator
NO Normally Open
SV Shutoff valve (outside the building)
PV Pilot valve
Direct gas ignition
Gas pilot ignition 1
Gas pilot ignition 2
Fuel valve
control program

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HVAC Products 2 Fuel train applications (examples) 29.05.2002
PS
min
V1
7550s03E/0499
LO
Program
Single-stage burner
V1
V2
7550s04E/0800
PS
min
LO
Program
2-stage burner
V1
V2
7550s05E/0800
PS
min
V3
LO
Program
3-stage burner
Fuel train applications
(cont‘d)
Direct ignition with
light oil, multistage